Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH 0/4] dcache: make Oracle more scalable on large systems | Date | Thu, 21 Feb 2013 16:13:45 -0800 |
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Dave Chinner <david@fromorbit.com> writes:
> On Tue, Feb 19, 2013 at 01:50:55PM -0500, Waiman Long wrote: >> It was found that the Oracle database software issues a lot of call >> to the seq_path() kernel function which translates a (dentry, mnt) >> pair to an absolute path. The seq_path() function will eventually >> take the following two locks: > > Nobody should be doing reverse dentry-to-name lookups in a quantity > sufficient for it to become a performance limiting factor. What is > the Oracle DB actually using this path for?
Yes calling d_path frequently is usually a bug elsewhere. Is that through /proc ?
-Andi
-- ak@linux.intel.com -- Speaking for myself only
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